CN112865162A - Communication interface method between upper computer and valve base control electronic equipment - Google Patents
Communication interface method between upper computer and valve base control electronic equipment Download PDFInfo
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- CN112865162A CN112865162A CN202110053829.8A CN202110053829A CN112865162A CN 112865162 A CN112865162 A CN 112865162A CN 202110053829 A CN202110053829 A CN 202110053829A CN 112865162 A CN112865162 A CN 112865162A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
- H02J13/00017—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus using optical fiber
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
Abstract
The invention discloses a communication interface method between an upper computer and valve base control electronic equipment in modular multilevel converter control equipment, which adopts high-level data link control (HDLC), wherein the upper computer control equipment outputs a first path and a second path of pulse signals of the HDLC to the valve base control electronic equipment, and receives a third path of signals of the HDLC from the valve base control electronic equipment, and the three paths of transmission signals are disordered and parallelly pass through a multimode optical fiber physical medium. The first and third transmission signal communication modes both adopt IEC60044-8 protocols. And the valve base control electronic equipment and the upper computer control equipment are in redundant configuration. The invention meets the interface requirements of valve base control electronic equipment of a large number of pulse outlets and simultaneously meets the control function requirements required by the operation of the modular multilevel converter.
Description
Technical Field
The invention relates to an electronic equipment interface technology, in particular to a communication interface method between upper computer Control system equipment and Valve Base Control electronic equipment (VBC-Valve Base Control) in a flexible direct current transmission system.
Background
The flexible direct current transmission is a mode of adopting an IGBT (insulated Gate Bipolar transistor) full-control device to form a voltage source type Converter valve for direct current transmission, and the Converter valve formed in a modular multilevel (MMC-Multi-level modulator Converter) mode is one of the modes. The control of the whole flexible direct current system is divided into two layers, namely a valve base control layer and an upper computer control equipment layer, wherein valve base control electronic equipment is responsible for pulse generation, trigger control and module fault detection of the converter valve, and the upper computer control equipment is used for controlling active power, reactive power and alternating current and direct current voltage of the direct current transmission system.
The division of system control functions is related to the interface mode of the equipment, and the clear division of the functions has important significance for reducing the troubleshooting range of the equipment and improving the availability of the equipment. In the existing traditional direct current transmission equipment, a converter valve is in a twelve-pulse bridge mode formed by thyristors, only twelve groups of pulses are needed, and the method for controlling the interface between system equipment and valve base control electronic equipment by an upper computer is as follows: the pulse generation and trigger control functions are distributed to the upper computer control equipment, twelve groups of generated pulses are directly sent to the pulse distribution unit equipment in a mode of electrically connecting metal handles, and then the received pulses are distributed to the converter valves by the pulse distribution unit equipment.
The existing interface method has the following defects: when the number of pulse groups required by the converter valve increases to dozens or even more than one hundred, the existing upper computer control equipment of the direct current transmission system is not enough to provide so many pulse outlets. In the novel modularized multi-level flexible direct-current converter valve, a large number of pulse outlets are needed, the requirement of the upper computer control equipment in the traditional direct-current transmission control cannot be met, a large number of pulse outlets are needed to be provided by special valve base control electronic equipment, and a brand new interface mode is adopted between the upper computer control equipment and the valve base control electronic equipment.
Disclosure of Invention
The invention aims to provide a method for a communication interface between upper computer control equipment and valve base control electronic equipment, which can be applied to a modular multi-level flexible direct current transmission control system and meets the communication requirement of the system.
In order to achieve the above purpose, the solution of the invention is:
a communication interface method between an upper computer and valve base control electronic equipment is suitable for control equipment of a modular multilevel converter, the communication interface at least comprises three signal transmission channels, a communication link layer adopts a high-level data link control HDLC protocol, and the signal transmission in the three signal transmission channels is carried out in disorder and in parallel through a multimode optical fiber physical medium; wherein:
the first path of transmission signal comprises: six bridge arm control commands, converter valve charging identification, bypass thyristor commands and converter valve locking signals are transmitted from an upper computer to valve base control electronic equipment;
the second path of transmission signals comprises: the transmission direction of the working state pulse signal running/standby by the upper computer is from the upper computer to the valve base control electronic equipment;
the third transmission signal includes: the trip signal, the request switching signal and the alarm returned by the valve base control electronic equipment and the sum of the voltages of the six bridge arms are transmitted to the upper computer from the valve base control electronic equipment.
Furthermore, the upper computer and the valve base control electronic equipment communicate with each other through an optical fiber communication interface board card and multimode optical fibers, wherein the optical fiber communication interface board card is a hardware board card special for IEC60044-8 protocol optical fiber communication.
Further, the first signal transmission channel is configured to: the number of valve base control electronic devices adopted by each bridge arm is N (N is 1, 2, 3.), and N optical fiber communication interface board cards are correspondingly adopted by the upper computer side; each optical fiber communication interface board card outputs six optical signals and is respectively connected to corresponding valve base control electronic equipment of six bridge arms, and the number of optical fibers connected with each optical fiber communication interface board card is 6.
Further, the second path of signal transmission channel is configured as follows: the number of valve base control electronic devices adopted by each bridge arm is N (N is 1, 2, 3.), and N optical fiber communication interface board cards are correspondingly adopted by the upper computer side; each optical fiber communication interface board card outputs six optical signals and is respectively connected to corresponding valve base control electronic equipment of six bridge arms, and the number of optical fibers connected with each optical fiber communication interface board card is 6.
Further, the third signal transmission channel is configured to: and the valve base control electronic equipment side of each bridge arm adopts an optical fiber communication interface board card, 1 path of optical signals are actually output and are connected to an upper computer, and the number of optical fibers is 1.
Furthermore, in the second path of transmission signals, the signal of the upper computer in the running state is a 1MHz high-frequency pulse, the signal in the standby state is a 10kHz pulse, and the valve base control electronic equipment can unlock the trigger pulse only when receiving the 1MHz high-frequency pulse signal.
Furthermore, the valve base control electronic equipment and the upper computer control equipment are in redundant configuration, and the running/standby state of the valve base control electronic equipment is consistent with that of the upper computer.
Furthermore, the valve base control electronic equipment and the upper computer control equipment both comprise a sleeve A and a sleeve B, the sleeve A of the upper computer control equipment is connected with the sleeve A of the valve base control electronic equipment, and the sleeve B of the upper computer control equipment is connected with the sleeve B of the valve base control electronic equipment; one of the two sets of upper computer control equipment is in an operating state, the other set of upper computer control equipment is in a standby state, and the operating/standby states of the connected valve base control electronic equipment and the upper computer control equipment are kept consistent.
Further, if the upper computer control equipment in the running state receives the trip signal, the upper computer control equipment is immediately switched to the standby upper computer control equipment, and the serious fault warning information is sent out; if the standby upper computer control equipment also receives a tripping signal, immediately tripping the inlet wire switch of the converter valve, and stopping the whole flexible direct current system; if only the standby upper computer control equipment receives the tripping signal, the standby upper computer control equipment exits the standby state and sends alarm information, and the normal operation of the whole direct current system is not influenced.
Further, when the valve base control electronic equipment detects that a general fault occurs in a system of the valve base control electronic equipment, a switching request signal is sent to the upper computer control equipment; if the upper computer control equipment in duty operation receives the switching signal, switching to the standby upper computer control equipment immediately, and sending out fault alarm information, and if the standby upper computer control equipment also receives a tripping signal at the same time, not executing tripping, and keeping the whole direct current system in normal operation; if only the standby system receives the trip signal, the standby upper computer control equipment receives and exits the standby state and sends alarm information, and the normal operation of the whole direct current system is not affected.
Further, when the valve base control electronic equipment detects that a slight fault occurs in a system of the valve base control electronic equipment, an alarm is sent to the upper computer control equipment; the upper computer control equipment only displays the alarm signal after receiving the alarm signal, and the control equipment does not have any switching behavior and does not influence the normal operation of the whole direct current system.
After the scheme is adopted, the invention has the beneficial effects that:
the function division is definite, the interface requirement of a large number of valve base control electronic equipment of pulse outlets is met, the reference voltage is sent to the valve base control electronic equipment through a proper interface method, the normal operation of flexible direct current transmission control is effectively guaranteed, the determination of the quantity and the name of signals needing to be transmitted between the upper computer control equipment and the valve base control electronic equipment and the data link allocation play an important role in stable operation of the system, the redundancy configuration operation connection mode of the upper computer control equipment and the valve base control electronic equipment can meet the redundancy configuration operation requirement, and a solid foundation is laid for the actual reliable operation of engineering.
Drawings
Fig. 1 is a topology diagram of a modular multilevel converter;
FIG. 2 is a schematic diagram of an embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention provides a communication interface method between an upper computer and valve base control electronic equipment, which is used in a topological converter control equipment interface of a modular multilevel converter shown in figure 1, wherein the figure comprises the converter, a bridge arm reactor and a transformer which are connected, and the bridge arm reactor and the transformer are connected to a power grid through a switch, the right side only shows a detailed structure for a bridge arm 1, and in practice, the bridge arms 1-6 are completely the same. Uc1-2, Uc1-2, …, Uc1-n are the capacitance voltages of each submodule.
The communication interface between the upper computer and the valve base Control electronic equipment at least comprises three signal transmission channels, the communication Link layer adopts High-Level Data Link Control (HDLC), the upper computer Control equipment outputs a first path of HDLC and a second path of pulse signals to the valve base Control electronic equipment, the upper computer Control equipment receives a third path of HDLC signals from the valve base Control electronic equipment, and the three transmission signals pass through a multimode optical fiber physical medium in an unordered and parallel manner.
The three-way signal is specifically defined as follows:
the HDLC first path adopts an IEC60044-8 protocol, the direction is from an upper computer control system to a valve base control electronic device, and the HDLC first path comprises six bridge arm control reference voltages (Upref1-6), a converter valve charging identifier (Ener _ on), a converter valve locking signal (Block) and a bypass thyristor command (Thy _ on) in each component module in a switching modular multilevel converter valve, which are obtained by an upper computer through a control algorithm;
and the second path is a pulse signal, the direction is from the upper computer control system to the valve base control electronic equipment, the content is an on-duty operation signal (Active) of the upper computer control system, and when the upper computer control system is in an on-duty operation state, the signal is a high-frequency pulse of 1 MHz. When the upper computer control system is not in the on-duty running state, the signal is high-frequency pulse of 10 kHz. The valve base control electronics can only unlock the trigger pulse when it receives a high frequency signal of 1 MHz. If the valve base control electronic equipment is in a redundant configuration (two sets of A/B), a system which is operated on duty is received at 1MHz, and a system which is standby is received at 10 kHz.
And the HDLC third path adopts an IEC60044-8 protocol, the direction is from the valve base control electronic equipment to the upper computer control system, and the contents are a tripping (VBC _ TRIP) signal, a request switching signal (VBC _ CHANGE), an alarm (VBC _ OK) and the sum of voltages (Σ Uc1-6) of six bridge arms returned by the valve base control electronic equipment.
Firstly, the three paths of signals all adopt multimode optical fiber transmission media and optical fiber communication interface boards of a special IEC60044-8 communication protocol, the second path is pulse, and each path adopts single-core multimode optical fiber.
As shown in fig. 2, the interface between the upper computer control system and the valve base control electronic device is implemented as follows:
in fig. 2, an optical fiber communication interface card is used, which is a hardware card dedicated to IEC60044-8 protocol optical fiber communication. The upper computer control system needs to add a layer of case, three corresponding optical fiber communication interface boards and a sufficient number of single-core multimode optical fibers. The three-way transmission signal interface mode between the upper computer and the valve base control electronic equipment is as follows:
the first signal transmission channel is formed as follows: the number of valve base control electronic devices adopted by each bridge arm is N (N is 1, 2, 3.), and N optical fiber communication interface board cards are correspondingly adopted by the upper computer side; each optical fiber communication interface board card outputs six optical signals and is respectively connected to corresponding valve base control electronic equipment of six bridge arms, and the number of optical fibers connected with each optical fiber communication interface board card is 6.
The second path of signal transmission channel is formed as follows: the number of valve base control electronic devices adopted by each bridge arm is N (N is 1, 2, 3.), and N optical fiber communication interface board cards are correspondingly adopted by the upper computer side; each optical fiber communication interface board card outputs six optical signals and is respectively connected to corresponding valve base control electronic equipment of six bridge arms, and the number of optical fibers connected with each optical fiber communication interface board card is 6.
The third signal transmission channel is configured to: and the valve base control electronic equipment side of each bridge arm adopts an optical fiber communication interface board card, 1 path of optical signals are actually output and are connected to an upper computer, and the number of optical fibers is 1.
Setting first and third transmission data communication time per frame in sending and receiving software, and filling corresponding contents according to an IEC60044-8 protocol, wherein the specific format is as follows:
the first path frame format of the HDLC is as follows:
the second path is pulse, and the upper computer control system determines to send out high-frequency pulse of 1MHz or 10kHz according to whether the current system is an operating system or a non-operating system.
The HDLC third frame format is as follows:
the upper computer control system and the valve base control electronic equipment are communicated according to the fixed format, the upper computer control system and the valve base control electronic equipment can be normally used after receiving information and decoding according to the format, and meanwhile, a channel monitoring mechanism is set to monitor and alarm the error code phenomenon caused by interference.
When the upper computer and the valve base control electronic equipment adopt redundant configuration, the connection mode is as follows: a set of upper computer control equipment A is connected with a set of valve base control electronic equipment A, a set of upper computer control equipment B is connected with a set of valve base control electronic equipment B, one set of A/B is in an operating state, the other set of A/B is in a standby state, and the operating/standby states of the connected valve base control electronic equipment and the upper computer control equipment are kept consistent.
If the upper computer control system in on-duty operation receives the tripping signal, the upper computer control system is immediately switched to a standby system and sends out serious fault warning information, and if the standby system also receives the tripping signal, the standby system immediately switches on the inlet switch of the converter valve, and the whole flexible direct current system stops operating. If only the standby system receives the tripping signal, the standby system exits the standby state and sends alarm information, and the normal operation of the whole direct current system is not influenced.
When the valve base control electronic equipment detects that a general fault occurs in a system of the valve base control electronic equipment, a request switching (VBC _ CHANGE) signal is sent to the upper computer control system. If the upper computer control system in duty operation receives the switching signal, the upper computer control system is immediately switched to the standby system and sends out fault alarm information, and if the standby system also receives the tripping signal at the same time, the whole direct current system keeps normal operation without tripping. If only the standby system receives the tripping signal, the standby system exits the standby state and sends alarm information, and the normal operation of the whole direct current system is not influenced.
When the valve base control electronic equipment detects that the system of the valve base control electronic equipment has slight fault, the alarm (VBC _ OK) is set to be 0, and the alarm is sent to the upper computer control system. The upper computer control system only displays the alarm signal after receiving the alarm signal, and the control system does not have any switching behavior and does not influence the normal operation of the whole direct current system.
By utilizing the interface method provided by the invention, the upper computer controls the alternating current and direct current voltage and the active and reactive power of the flexible direct current transmission system, the final output result is the reference voltage (Upref1-6) of six bridge arms, the reference voltage is sent to the valve base control electronic equipment, the valve base control electronic equipment generates a trigger pulse according to the received reference voltage and adopts a proper modulation mode to send the trigger pulse to the IGBT trigger unit of each component module of the modularized multi-level converter valve, the actual output alternating current voltage is generated, and the control requirement of the whole flexible direct current system is finally completed.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the protection scope of the present invention.
Claims (11)
1. A communication interface method between an upper computer and valve base control electronic equipment is suitable for control equipment of a modular multilevel converter and is characterized in that the communication interface at least comprises three signal transmission channels, a communication link layer adopts a high-level data link control HDLC protocol, and the signal transmission in the three signal transmission channels is carried out in disorder and in parallel through a multimode optical fiber physical medium; wherein:
the first path of transmission signal comprises: six bridge arm control commands, converter valve charging identification, bypass thyristor commands and converter valve locking signals are transmitted from an upper computer to valve base control electronic equipment;
the second path of transmission signals comprises: the transmission direction of the working state pulse signal running/standby by the upper computer is from the upper computer to the valve base control electronic equipment;
the third transmission signal includes: the trip signal, the request switching signal and the alarm returned by the valve base control electronic equipment and the sum of the voltages of the six bridge arms are transmitted to the upper computer from the valve base control electronic equipment.
2. The method as claimed in claim 1, wherein the upper computer communicates with the valve base control electronic device via an optical fiber communication interface card and a multimode optical fiber, wherein the optical fiber communication interface card is a hardware card dedicated for IEC60044-8 protocol optical fiber communication.
3. The method of claim 2, wherein the first signal transmission path comprises: the number of valve base control electronic devices adopted by each bridge arm is N (N is 1, 2, 3.), and N optical fiber communication interface board cards are correspondingly adopted by the upper computer side; each optical fiber communication interface board card outputs six optical signals and is respectively connected to corresponding valve base control electronic equipment of six bridge arms, and the number of optical fibers connected with each optical fiber communication interface board card is 6.
4. The method of claim 2, wherein the second signal transmission channel is configured to: the number of valve base control electronic devices adopted by each bridge arm is N (N is 1, 2, 3.), and N optical fiber communication interface board cards are correspondingly adopted by the upper computer side; each optical fiber communication interface board card outputs six optical signals and is respectively connected to corresponding valve base control electronic equipment of six bridge arms, and the number of optical fibers connected with each optical fiber communication interface board card is 6.
5. A method of interfacing communications between an upper computer and valve base control electronics as claimed in claim 2, wherein the third signal transmission path is configured to: and the valve base control electronic equipment side of each bridge arm adopts an optical fiber communication interface board card, 1 path of optical signals are actually output and are connected to an upper computer, and the number of optical fibers is 1.
6. The method as claimed in claim 1, wherein the valve base control electronic device and the upper computer control device are configured in a redundant manner, and the operation/standby state of the valve base control electronic device is consistent with that of the upper computer.
7. The method as claimed in claim 6, wherein the valve base control electronic device and the upper computer control device each include a set a and a set B, the set a of the upper computer control device is connected to the set a of the valve base control electronic device, and the set B of the upper computer control device is connected to the set B of the valve base control electronic device; one of the two sets of upper computer control equipment is in an operating state, the other set of upper computer control equipment is in a standby state, and the operating/standby states of the connected valve base control electronic equipment and the upper computer control equipment are kept consistent.
8. The method of claim 1, wherein the method comprises the steps of: in the second path of transmission signals, the signal of the upper computer in the running state is a 1MHz high-frequency pulse, the signal in the standby state is a 10kHz pulse, and the valve base control electronic equipment can unlock the trigger pulse only when receiving the 1MHz high-frequency pulse signal.
9. The method as claimed in claim 6, wherein if the upper computer control device in operation receives the trip signal, it switches to the spare upper computer control device and sends out the alarm information of serious failure; if the standby upper computer control equipment also receives a tripping signal, immediately tripping the inlet wire switch of the converter valve, and stopping the whole flexible direct current system; if only the standby upper computer control equipment receives the tripping signal, the standby upper computer control equipment exits the standby state and sends alarm information, and the normal operation of the whole direct current system is not influenced.
10. The communication interface method between the upper computer and the valve base control electronic device according to claim 6, wherein when the valve base control electronic device detects a general failure of its own system, it sends a switching request signal to the upper computer control device; if the upper computer control equipment in duty operation receives the switching signal, switching to the standby upper computer control equipment immediately, and sending out fault alarm information, and if the standby upper computer control equipment also receives a tripping signal at the same time, not executing tripping, and keeping the whole direct current system in normal operation; if only the standby system receives the trip signal, the standby upper computer control equipment receives and exits the standby state and sends alarm information, and the normal operation of the whole direct current system is not affected.
11. The communication interface method between the upper computer and the valve base control electronic device according to claim 6, wherein when the valve base control electronic device detects a slight fault of its own system, it sends an alarm to the upper computer control device; the upper computer control equipment only displays the alarm signal after receiving the alarm signal, and the control equipment does not have any switching behavior and does not influence the normal operation of the whole direct current system.
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| CN202110053829.8A CN112865162B (en) | 2021-01-15 | 2021-01-15 | Communication interface method between upper computer and valve base control electronic equipment |
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